Here is the full list of all 67 Ultratron achievements.
Held one or more pets for 10 levels without dropping
Player has fired 100000 shots in a game
Drone survived 30 levels
Drone survived 20 levels
Shooty pet levelled up to maximum
Vanquished 10000 enemies
Detonated 10 bombfruits
Laser pet levelled up to maximum
Drone survived 10 levels
Rocket pet levelled up to maximum
Collected 50 fruits
Awesome double three way bouncy gun
Held one or more pets for 5 levels without dropping
EMP shocked 50 enemies in one blast
Beat a level without firing a single shot
Maximum shields
Detonated 25 smartbombs in a single game
Quantum-shifted through a boss
EMP shocked 25 enemies in one blast
Vanquished 5000 enemies
EMP shocked 10 enemies in one blast
Maxed turbo power and recharge
Maximum dot slurp range
Maximum droid power
Killed 1000 enemies with grenades
Maximum drone upgrades
Upgraded laser pet to maximum
Upgraded rocket pet to maximum
Upgraded shooty pet to maximum
Grenade add-on upgrades maxed
Upgraded all pets to maximum parameters
Defeated two bosses
Killed 500 enemies with grenades
20 kills with a single grenade
Defeated Letum
Killed 100 enemies with grenades
Defeated Lues
10 kills with a single grenade
Smartbombed 25 enemies with one blast
Full complement of smartbombs
Collected 25 fruits
Player has fired 10000 shots in a game
Vanquished 2500 enemies
Defeated Bellum
Got 100% on a dodge stage
Collected 1000 dots
Collected 10 fruits
Consumed 10 consecutive fruits
Defeated Ieiunitas
Survived assault level without taking damage
Vanquished 1000 enemies
Collected 500 dots
Got 100% on a challenge stage
Vanquished 500 enemies
Maximum score multiplier
Collected 250 dots
Collected 100 dots
Smartbombed 10 enemies with one blast
Player has fired 1000 shots in a game
Vanquished 100 enemies
30 kills with a single grenade
Double three way bouncy bezerk gun
Double three way bouncy max power rapid fire gun
Single drone shot down 100 enemy bullets
Single drone vanquished 250 enemies
Smartbombed 50 enemies with one blast
Held one or more pets for 20 levels without dropping